Seal-lock



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SEAL LOCK.

Patented Aug. 28, 1883.

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SEAL LOCK. l I l No. 283,836. Patented' Aug. 28, 1883..

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UNITED STATES PATENT Oiuncn.4

ROBERT O. NVALKER AND SOPHRONIE IVALKER, OF CHICAGO, ILLINOIS.

SEAL-LOCK.

SPECIFICATION forming part of Letters Patent No. 283,836, dated August 28, 1883,

Application filed March 27, 1893. (Model.)

.To @ZZ whom it may concern:

Be it known that'we, ROBERT O. WALKER and SoPHRoNIn WALKER, citizens ofthe United States of America, residing at Chicago, in the county of Cookand State of Illinois, have invented a new and useful Improvement inSeal-Locks, of which the following is a specification, to wit:

This invention relates to seal-locks; and it consists in the peculiarconstruction of the same, whereby the several parts of the bolt areinterchangeable and are adapted to perforate a seal as'the bolts arethrown back, substantially as will be hereinafter more fully set forth.

In order to enable others skilled in the art to which our inventionrelates to make and use the same, we will now proceed to describe itsconstruction and operation, referring to the accompanying drawings, inwhich- Figure l is a side elevation of the lock applied toa door, andwith part of the case broken away. Fig. 2 is a Vertical section on theline ff, Fig. l. Fig. 3 is a similar view taken on the linet t, Fig. l.Fig. 4 is a perspective view of one ofthe parts ofthe lock-bolt. Figs. 5and G are views of keys applicable to this lock, and Fig. 7 is aperspective view of the lock with the case broken away to show theinterior.

This lock is represented in the drawings of a form peculiarly applicableto frei ght-cars; and A indicates the lock-casennortised into the doorB, and engaging with the catch I3 on the doorflame C. This case A isprovided with a bolt formed in several sections, d d d, each of which isbeveled upon its outer corner at one end and'provided at the other witha small perforated projection or lug, g, with which engages one end of aspring7 o, secured upon a post, a, and having its opposite end held inposition by a post, c. These springs hold the bolts in a normally-lockedposition. The parts of the bolt are placed side by side, `and are ontheir'rear edges provided with notches z', of different depths and form,corresponding to the wards of the key to be used. Each portion d d dofthe bolt is also formed on one side with a beveled projection or cam,c, the purpose of which will be presently seen, and the bolts are allheld in proper position and relation to each other within the case byposts t and a. One of the sides of the lock-case is upon its inner sideprovided with a ilat spring, s, secured firmly at one end to the case A,and having its other or free end adapted to contact with the cam a uponthe. adjacent portion of the lock-bolt. Upon the free end of this springis a pin, s, adapted to pass through the case into a small cylinder, c,which is secured to the side of the lock-case, and extends out ilushwith the outer surface of the door B, and containing a small piston, c,held in position by a spiral spring, as seen in the drawings.

In operation the car is locked and a seal, n, placed over the end of thetube or cylinder e. The key being then placed in the key-hole m andturned, the wards strike upon the edges of the notches z of thelock-bolts, and` as these notches are of various shapes and depths theparts of the bolt will be moved from their normal position separately7but will all assume a corresponding position when thrown fully back. Themovement of the upper part of the bolt and its cam a, forces out the endofthe spring .5, and its pin s enters the tube e and forces out theplunger e', thus perforating the seal a. This seal is small and notliable to be noticed, and will at once record any tampering with alock'. The arrangement of the notches f by which the parts of the boltare started separately also makes it dii'iicult to pick this lock, andthe portions of the bolt'being interchangeable their position withrelation to each other may be varied at any time should a key be lost orstolen, and thus prevent the old key from being used.

It is obvious that this arrangement is not confined to car-locks, butmay with equal effect be applied to padlocks or other fastening devices.i

IVe are aware that it is not new to puncture a seal by the movement of alock-bolt operating a spring-pin, and we do not therefore Iclaim such,broadly, as our invention.

I-Iaving thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is-

l. Ina seal-lock, the pin s, secured upon the end of the flat spring s,carried by the lockcase, and projecting into the Vcylinder c, prosi I2831836 vided with a spring-plunger, e, and a seal, in combination witha lock-bolt formed with a cani projection, adapted, when the n bolt isthrown back, to slide beneath the spring-pin and cause it to force thespring-plunger outward and thereby break the seal, substantially asdescribed. Y

2. In aseal-lock, a lock-bolt formed in several interchangeable parts,each of which is provided with a projection or cani, in combination witha small spring piston or plunger 'adapted by the backward motion of thebolt to be thrown out and puncture a suitable seal placed over its end,substantially as described and shown.

3. In a seal-lock, the case A, sectional bolt d d d, having notches i13, of varying form, and each having a cani, c, and the springs o, incombination with a ilat spring, s, secured to the loclccase, and havingits free end provided with a pin, s', tube c, and its plunger e',

all constructed and arranged to operate substantially as and for thepurpose set forth.

In testimony whereofwe affix our signatures in presence of twowitnesses.

ROBERT O. WALKER. SOPHRONIE WALKER. Witnesses:

'.GHAs. KREssMANN,

FRANK Jor-INsoN.

